Q: My husband manipulated my sister and got married to my sister without giving me a divorce. When my sister got to know that their marriage is not valid after a year, she got married to another man. That man left my sister beacuse he thought she did nikah on nikah, but that was not the case.
A: It is not permissible in shariah for a person to be married to two sisters at one time. If a person marries a woman and thereafter marries her sister, the second nikaah will not be valid and will not take place. Hence, the nikaah of your sister with your husband was not valid (nikaah-e-baatil). When the nikaah was not valid, then it was not compulsory upon her to sit in iddat after separating from him.
After separating from him, her nikaah with the next person was valid. There was no need for him to separate from her.
And Allah Ta'ala (الله تعالى) knows best.
Answered by:
Checked & Approved: